The static response of his thumb had Bucky's eyes flickering to where his hand should be, no idea how the touch to his cheek could have caused that. A funny thing, how his brain could pick out an exact location in space for what wasn't there. He almost brought up his own hand to try it again, but kept still instead, not sure where this was going.
Usually medical discussions were done over him than to him, in jargon he couldn't make much sense of if he was in a state to comprehend much at all. But Lecter had put it in terms he could follow, could match with his experience and accept as true. His brain was confused, making a lot of mistakes. What he could understand of the explanation made sense, the concept of remapping a little abstract when he wasn't too sure how it all worked.
He wondered, briefly, if the amnesia had any part in further messing up his brain, if simply never remembering having that arm at all was contradicting what his brain knew or what it was looking for. But he nodded, looking at the wand in quiet doubt before squaring his shoulders again and closing his eyes. "Okay," he repeated again. Relaxing was difficult. Especially when he couldn't see his surroundings, his ears picking up on every small sound for threats that weren't there. He tried counting down backward from 100, to give himself to focus on.